Since 1991, Helen Regenstein Conductor Emeritus Pierre Boulez has amassed and extraordinary discography with the Chicago Symphony Orchestra, including landmark twentieth-century masterpieces by Béla Bartók, Igor Stravinsky, and Edgard Varèse, as well as Gustav Mahler and Richard Strauss. And in 2005 as part of the CSO’s From the Archives series, a two-disc tribute of radio broadcast performances was released. A complete list of those recordings is below: